heap.h File Reference

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Data Structures
struct	header
struct	footer
struct	index_entry
struct	index_table
struct	heap

Macros
#define	TABLE_SIZE   0x1000
#define	KHEAP_BASE   0xD000000
#define	KHEAP_MIN   0x10000
#define	KHEAP_SIZE   0x1000000

Functions
u32int	_kmalloc (u32int size, int align, u32int *phys_addr)
u32int	kmalloc (u32int size)
u32int	kfree ()
void	init_kheap ()
u32int	alloc (u32int size, heap *hp, int align)
heap *	make_heap (u32int base, u32int max, u32int min)

Macro Definition Documentation

#define KHEAP_BASE   0xD000000

Definition at line 6 of file heap.h.

Referenced by alloc(), and init_paging().

#define KHEAP_MIN   0x10000

Definition at line 7 of file heap.h.

Referenced by alloc(), and init_paging().

#define KHEAP_SIZE   0x1000000

Definition at line 8 of file heap.h.

Referenced by init_paging().

#define TABLE_SIZE   0x1000

Definition at line 5 of file heap.h.

Function Documentation

u32int _kmalloc	(	u32int	size,
		int	align,
		u32int *	phys_addr
	)

Definition at line 24 of file heap.c.

References alloc(), page_entry::frameaddr, get_page(), and phys_alloc_addr.

Referenced by get_page(), init_paging(), and kmalloc().

{
  u32int *addr;

  // Allocate on the kernel heap if one has been created
  if (kheap != 0){
    addr = (u32int*)alloc(size, kheap, page_align);
    if (phys_addr){
      page_entry *page = get_page((u32int)addr, kdir, 0);
      *phys_addr = (page->frameaddr*0x1000) + ((u32int)addr & 0xFFF);
    }
    return (u32int)addr;
  }
  // Else, allocate directly from physical memory
  else {
    if (page_align && (phys_alloc_addr & 0xFFFFF000)){
      phys_alloc_addr &= 0xFFFFF000;
      phys_alloc_addr += 0x1000;
    }
    addr = (u32int*)phys_alloc_addr;
    if (phys_addr){
      *phys_addr = phys_alloc_addr;
    }
    phys_alloc_addr += size;
    return (u32int)addr;
  }
}

u32int alloc	(	u32int	size,
		heap *	hp,
		int	align
	)

Definition at line 57 of file heap.c.

References base, KHEAP_BASE, KHEAP_MIN, no_warn, and serial_println().

Referenced by _kmalloc().

{
  no_warn(size||align||h);
  static u32int heap_addr = KHEAP_BASE;

  u32int base = heap_addr;
  heap_addr += size;

  if (heap_addr > KHEAP_BASE + KHEAP_MIN)
    serial_println("Heap is full!");

  return base;
}

void init_kheap

(

)

u32int kfree

(

)

u32int kmalloc

(

u32int

size

)

Definition at line 52 of file heap.c.

References _kmalloc().

Referenced by init_paging(), initHeap(), make_heap(), and sys_alloc_mem().

{
  return _kmalloc(size,0,0);
}

heap* make_heap	(	u32int	base,
		u32int	max,
		u32int	min
	)

Definition at line 71 of file heap.c.

References kmalloc(), and no_warn.

Referenced by init_paging().

{  
  no_warn(base||max||min);
  return (heap*)kmalloc(sizeof(heap));
}